CVE-2021-20181
Fixed in a distro release EPSS <1%
A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.
Products: qemu, debian_linux
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 10 | qemu | 1:3.1+dfsg-8+deb10u9 |
| Debian 12 | qemu | 1:5.2+dfsg-4 |
| Debian 13 | qemu | 1:5.2+dfsg-4 |
| Debian 14 | qemu | 1:5.2+dfsg-4 |
| Debian 9 | qemu | 1:2.8+dfsg-6+deb9u13 |
| SUSE Enterprise Storage 6 | qemu | 3.1.1.1-9.24.3 |
| SUSE HPE Helion OpenStack 8 | qemu | 2.9.1-6.47.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | qemu | 3.1.1.1-9.24.3 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | qemu | 3.1.1.1-9.24.3 |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | qemu | 2.11.2-9.43.1 |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | qemu | 2.11.2-9.43.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | qemu | 4.2.1-11.13.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | qemu | 4.2.1-11.13.1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kvm | 1.4.2-53.38.1 |
| SUSE Linux Enterprise Server 11 SP4-LTSS | kvm | 1.4.2-60.34.1 |
| SUSE Linux Enterprise Server 12 SP2-BCL | qemu | 2.6.2-41.62.1 |
| SUSE Linux Enterprise Server 12 SP3-BCL | qemu | 2.9.1-6.47.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | qemu | 2.9.1-6.47.1 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | qemu | 2.11.2-5.29.1 |
| SUSE Linux Enterprise Server 12 SP5 | qemu | 3.1.1.1-48.2 |
| SUSE Linux Enterprise Server 15 SP1-BCL | qemu | 3.1.1.1-9.24.3 |
| SUSE Linux Enterprise Server 15 SP1-LTSS | qemu | 3.1.1.1-9.24.3 |
| SUSE Linux Enterprise Server 15-LTSS | qemu | 2.11.2-9.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | qemu | 2.9.1-6.47.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | qemu | 2.11.2-5.29.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | qemu | 3.1.1.1-48.2 |
| SUSE Linux Enterprise Server for SAP Applications 15 | qemu | 2.11.2-9.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | qemu | 3.1.1.1-9.24.3 |
| SUSE Manager Proxy 4.0 | qemu | 3.1.1.1-9.24.3 |
| SUSE Manager Retail Branch Server 4.0 | qemu | 3.1.1.1-9.24.3 |
| SUSE Manager Server 4.0 | qemu | 3.1.1.1-9.24.3 |
| SUSE OpenStack Cloud 8 | qemu | 2.9.1-6.47.1 |
| SUSE OpenStack Cloud 9 | qemu | 2.11.2-5.29.1 |
| SUSE OpenStack Cloud Crowbar 8 | qemu | 2.9.1-6.47.1 |
| SUSE OpenStack Cloud Crowbar 9 | qemu | 2.11.2-5.29.1 |
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.49 |
| Ubuntu 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.35 |
| Ubuntu 20.04 LTS | qemu | 1:4.2-3ubuntu6.12 |
| Ubuntu Pro 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.47+esm6 |
| Ubuntu Pro 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.51+esm4 |
| Ubuntu Pro 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.42+esm5 |
| Ubuntu Pro 20.04 LTS | qemu | 1:4.2-3ubuntu6.30+esm1 |
| openSUSE Leap 15.2 | qemu | 4.2.1-lp152.9.9.2 |
| openSUSE Leap 15.2 | qemu-linux-user | 4.2.1-lp152.9.9.3 |
| openSUSE Leap 15.2 | qemu-testsuite | 4.2.1-lp152.9.9.5 |
| openSUSE Tumbleweed | qemu | 6.1.0-32.1 |